Gun with recoiling barrel.



K. VOLLBR. GUN WITH BEGOILING BARREL. APPLICATION FILED NOV. 14. 1910.

1,020,233, Pzitented Man-12, 1912 'INVENTEIR W i GDLIZ'MIIA'I'LANUGRAMI KID-.WASHINGTDN u c Be it known that "I, KARL V'bL n GUN wrrn: RECOILING BARREL.

To all whom it may concern:

'neer, a subject of the German Emperor, re-

siding at 17' J filicherstrasse, Dusseldorf, Germany, have invented certain. new and useful Improvements in Guns withRecoiling Barrels; and I do hereby declare the following to be a full, clear; and? exact description of the invention, such as will enable; others skilled in the art to which it appertain's to make and use the same.

In] having a recoiling barrel which "isretur-ned by a spring, it is apt to happen of the gun barrel.

that the energy imparted to the barrel by the spring is not completely absorbed by. the brake at the end of the return movement so that the barrel strikes forcibly the projection which determines the forward position of the barrel. In order to minimize this shock elastic material, such as rubber buffers, has been provided on the projections.

The present invention consists in eliminating such elastic material and using the return spring for producing the effect thereof.

The construction according to the invention is shown in the accompanying drawings wherein t Figure 1 shows the return mechanism n longitudinal section and Fig. partly in section and partly in rear elevat1on.f If

The barrel a is guided in the tubular cradle 72 and slides therein during the recoil, the energy of therecoil being absorbed by a brake, not shown in the drawings, and the return spring hereinafter described being compressed. In the case shown two exactly similar return mechanisms are used, one on each side of the middle vertical plane Two rods (1 are fixed by means of bayonet joints 6 to a dependi g lug c on the cradle b, and extend rearwardly. Against a collar f on the rod abuts a di k 9 which can slide on the rod, but which is in the other direction the disk can move against the pressure of the return spring. The nut 'Z is screwed on to the threaded re- UNITED STATES PATENT OFFICE.

KARL VfiLLER, OF DUSSELDORF, GERMANY, ASSIG-NOR T0 RHEINISGHE METALL- WAABEN- UND MASCHINENFABRIK, OF DUSSELDORF-DERENDORF, GERMANY.

Specification 01' Letters Iatent.

Application filed November 14,1910. Serial No. 592,303.

|. I l duced end of the red d, and isfor-itsfieat "the disk g. The other end of the cylinder bore in the cradle b and has two alined lugs Patented Mar. 12, 1912.

part of the same external diameter as the rod 03. It serves for adjusting the preliminary compression of the return spring. The latter is surrounded by a cylinder m, the '60.; partly closed end 1:. of which abuts against is closed by a cover 0 fixed to it by a bayoy net joint andsecured by a pin p. The coveris so formed that it lies closely against the f disk ?I which is prevented from rotating in the cylinder m by a tongue and groove, but has a certain amount of play relatively to; L, the rod (1 or nut l.

The cylinder m is accommodated in a '70 g on one side which engage between them a depending lug r on thebarrel a. The, rearward lug g has a spring pin 8 by means of which the cylinder m 1s locked to the 7 barrel in the following manner :The cylinder is inserted in its bore in such a position that the lugs Q can slide past the lug 1'; when'the lug r registers with the space between the lugs g the cylinder m is rotated on its axis until the lugs g engage the lug r, whereupon the spring pin 8 looks the cylinder m, preventing it from being again turned. The position of the lugs g rela tively to the engaging parts of the bayonet joint e on the rod (1 is such that by the rotation of the cylinder m, which is shared by the rod d, the lugs g engage wi fig r at fi Sa 1311116 t. The parts of the bayone t wm e gege with each other. By this 9U r gement it is possible to remove the. hfbie return mechanism from the cradle hile the spring is in place.

The mechanism operates as follows: When the barrel a recoils its lug 1" carries with it the cylinder m, while the rod (1! re-' i' mains at rest. The end 72. of the cylinder brings the disk 9 backward, while the sec- 0nd disk 2' is held stationary by the nut Z and rod d. The spring 72. is therefore compressed during the recoil. At the end of the recoil the spring it expands and moves the barrel a forward, since it presses the disk g, end 0?. of cylinder m and therefore the lug r of the barrel (1,. If during there- I05 turn the barrel a, after arriving at the position shown, continues to move forward, be- I cause the brake has not absorbed the whole of the energy, the spring it cannot expand further, for the disk 9 is held by the collar.

f. But the end of the cylinder mfcan carry the disk z with it and can thus compress the spring h, which therefore itself absorbs the-"rest of the energy and serves as a buffer for the forward movement.

Having thus described the'nature of my invention and the best means I know of carrying the same into practical efi ect, I claim:

1. In a un having a recoiling barrel and a returnspring a eradle arearwardly eX- tending' rod fixed to the cradle and surrounded by the spring, two disks adapted to slideon the said rod and to hold the said :5 spring in compression between them.., and

stops on the said rod adapted to prevent. the spring in its normal state of compression from moving the disks farther apart from each other. v i

2.- In a gun having a re'coiling barrel and a return spring, a cradle, a re'arw'ardly ex} tending rod fixed to thesaid cradle and surrounded" by the spring, two disks adapted to slide on the said rod and to hold the said spring in compression between them, a cylinder adapted to move with the barrel and surrounding the said spring, means for preventing one of the said disks from sharing any movement of the cylinder except a forward movement beyond the normal position and means for causing the other disk to share all movements of the cylinder except a-forward movement beyond the normal position.

3. In a gun having a recoilin'g barrel and I a return spring a cradle, a rearwardly ex- ;tending ro d surrounded by the spring, a bayonetjoint' o'omieetingthe said-rod with the said cradle, a cylinder surrounding the said spring and a bayonet joint connecting 4 I the said cylinder with the barrel, the relative position of the engaging parts of the two bayonet joints being such that both joints are put into engagement by the same rotation of-th e cylinder @on its axis. 4b In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

Witnesses PETER NOLFGARTEN, WILHELM TACK.

Copies of this=patent may be obtained for five cents each, by addressing the Commissioner of Patents,

v illfashing'ton, D. 

